docs: add intro and edit ignoring files page (#16510)
docs: add intro and edit ignoring files page (#16510)

* docs: add intro and edit ignoring files page

Partial fix of #16473

* copy edit

* Apply suggestions from the code review

Co-authored-by: Nicholas C. Zakas <3b9de09f2ff76afe9f0ad4fcae4ff68f52ec7fc4@humanwhocodes.com>
Co-authored-by: Amaresh  S M  <bccc7e16645041d8608bd482c51dad56932eadd3@gmail.com>

Co-authored-by: Nicholas C. Zakas <3b9de09f2ff76afe9f0ad4fcae4ff68f52ec7fc4@humanwhocodes.com>
Co-authored-by: Amaresh  S M  <bccc7e16645041d8608bd482c51dad56932eadd3@gmail.com>
eslint/eslint,eslint/eslint